Set camera to manual.
Establish your foreground base exposure by pointing the lens at foreground and taking the meter reading through the lens.
Take a sky reading and note the exposure difference between the ground and sky.
Select the right ND grad to correct exposure difference to within 1 stop. For example, if the sky is 3 stops brighter than the ground, add a 0.6 ND (2 stop) grad filter to the sky only.
Slide the filter into position. The grad transition should be visible through the viewfinder or on the LCD screen.
Shoot image using the base exposure already established in step #2.
With LEE 0.9 ND Soft Grad
LEE ND Grads are handmade in England to exacting standards. The ND gradation is gradually built up by dipping optically correct resin in baths of dye and continuously monitoring the results. Each filter represents up to an hour of skilled work.